OK. Thanks to all the help here I decided on a rim. The Ultra Magnus in black.

They are only available in 20 inch. Beside adding an inch of height to my truck and added cost of rim and tire any other advantages or disadvantages going to a 20 from stock 18? Its an 06 FX4 with level kit. Will a 325'60'20 work or will I have issues with the control arms being rubbed? If they will rub Ill go 305/

 

They will not add an inch of height to your vehicle. Only the final diameter of the tire you use will add or subtract form vehicle height.

 

I see. OK so the biggest tire I can go with without rubing would be???

 

Like you said, a 325/60-20 (35x13.00) or a 35x12.50 will rub the control arms at full steering lock. If you want no rubbing at all, stick with a 305/55-20 (33x12.50) or a narrow 35 inch tire like a 285/65-20 (35x11.50).